Roller-mill



(No Model.) .2 Sheets-Sheet 1.

' J. W. VAUGHAN ROLLER MILL.

Patented Oct. 2, 1894.

/N W; N TOR JQHNWVAUGHAN,

(No Model.) 2 Sheets-Sheet 2.

J. W. VAUGHAN.

ROLLER MILL.

No. 526,795. Patented Oct. 2,1894.

/ N VE N To)? J 01m WVAU GHAN,

' ATTOHY.

UNITED STATES PATENT QFFICE.

JOHN W. VAUGHAN, OF TAYLORSVILLE, INDIANA.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 526,795, dated October 2, 1894.

Application filed June 5, 1893- Serial No. 476.617. (No model.)

To all whom it may concern.-

Be it known that I, J OHN W. VAUGHAN, a citizen of the United States, residing at Taylorsville, in the county of Bartholomew and State of Indiana, have invented'certain new and useful Improvements in Roller-Mills, of which the following is a specification.

The object of my said invention is to improve the means of adjustment of the various parts of roller mills.

A mill embodying said invention will be first fully described, and the novel features thereof then pointed out in the claims.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is an end elevation with some parts in section of a mill embodying my said invention; Fig. 2, a vertical sectional View on the dotted line 2 2 in Fig. 1; Fig. 3, a detail View of the lower end of one of the roll carrying arms and adjusting parts as seen from the dotted line 3 3 in Fig. 1; Fig. 4, a detail plan View of a fragment of the countershaft and its adjustable bearings; Fig. 5, a detail sectional View on the dotted line 5 5 in Fig. 2, and Figs. 6 and 7 detail sectional views, on an enlarged scale, of the adjustable boxings for the roll shafts.

In said drawings the portions marked A represent the frame-work of the machine; 13, a driving shaft; 0, a counter-shaft; D, the grinding rolls; D D D D the roll-shafts E, arms carrying the roll-shafts D and D and F the rock-shaft by which and the gearing attached thereto the arms E are thrown back and forth, and the rolls into and out of grinding relation.

The frame A and driving shaft B are or may be of a well known form, and, not being of my present invention, will not be further described herein, except incidentally in describing said invention.

The counter shaft 0 is also positioned and operates in a well known manner. It is, however, peculiarlv mounted. Its boxes 0' are mounted in slides A on the frame A, and are adapted to be moved vertically therein. Pivoted to said boxes and to points on the framework, by the pivots c and a, are toggle links 0 united, and connected to nuts 0 by pivots 0 A right and left hand screw threaded rod 0 mounted 011 the frame-work A and swinging arms E, in the usual and well known manner, and said boxes themselves are in their general form of a usual and well known construction. Within the cap P of each box, however, I prefer to place abearing plate P fitted to rest upon the shaft and adapted to be operated by a set screw suitably mounted on a screw threaded perforation in said cap. By

this means the bearing of each roll shaft can be regulated independently of the others, and without stopping the machine, and all of said bearings kept tight, as they properly should be.

The swinging arms E are mounted on pivots e, which in turn are carried by housings E supported by pivot bearings e and bolts E the latter of which are attached to the frame A and extend down through perforations in said housings, with a jam nut e upon each side. By moving said nuts e the housing carrying the arm may be raised or lowered, and its relative vertical position thus determined. The lower ends of the arms are held against the pivots e by springs S surrounding rods R attached to the frame A at one end, and passing. through perforations in said arms at the other. The follower R on each of said rods, operated by a nut, regulates the tension of the spring, which is interposed between said follower and a bearing surface on the lower end of each arm. These springs are positioned to exert their force downwardly, as well as toward the pivots e, and thus they serve to hold the arms E, with the roll shafts which they carry, down firmly onto the pivots by which they are supported, thus effectually preventing any lost motion. At the upper ends the positions of the arms E are determined by screw threaded rods E bearing against levers E and these are simul taneously operated to throw said arms in and out, and the grinding rolls thus into or out of grinding relation, by the rock shaft F. Said rock shaft F has pinions F mounted thereon which engage with other pinions F the shafts l3 whereof are provided with cams or cam grooves which rest against the ends of the levers E By swinging the handle F back and forth these cams are caused to operate through the lovers and throw the arms E back and forth, as will be readily understood.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a roller mill, with the counter shaft 0, of its boxes 0 mounted in Vertical slides A on the frame-work A, the toggle links 0 pivoted to said boxes and to appropriate bearings on the frame-work at the outer ends, and to nuts O at theinner ends where they come together, and a screw threaded rod (3 passing through said nuts, whereby said toggle links are operated and the bearings carrying the shaft thus elevated or depressed, substantially as set forth.

2. The combination, in a roller mill, of the framework, housings E secured to said frame-work by pivots e at one side and by screw rods E having adjusting nuts e at the other, pivots e in said housings, arms E having elongated slots mounted on said pivots, rolls supported by said arms, springs interposed between the lower end of said arms below the pivots and bearings on the framework, and mechanism for operating said arms at the upper ends thereof, substantially as shown and described.

In witness whereof I have hereunto set my JOHN W. VAUGHAN.

Witnesses:

ARTHUR W. PRUITT, WILLIAM ASHBY. 

